BILD 26 Lecture Notes - Lecture 1: Blood Sugar, Negative Feedback, Citric Acid Cycle
Document Summary
Temperature: 37 c measured by special cells in the hypothalamus. o accelerates or decreases rate of chemical reactions in the body o too high (hyperthermia) sweating, dilation of blood vessels, 5oc above normal range proteins start breaking down, and neurons malfunction possibly leading to seizures o too low (hypothermia) thermogenesis (heat generation) through shivering, constriction of blood vessels, below 25c the heart stops beating. 2 major groups: o exocrine secrete fluids and juices via ducts (i. e. tear gland, salivary gland, sweat gland, pancreas, liver, gall bladder, pheromones) o endocrine secrete hormones (i. e. thyroid gland, hypothalamus, adrenal gland, etc) Lipid bilayer permeability summary o can freely pass through: lipid soluble molecules, gases, and some small molecules o cannot pass through: ions and large polar molecules. Facilitated diffusion (aka uniport) protein mediated transport for charged/water soluble/large molecules; through channel protein or carrier proteins o active transport.
